An integrated generation, transmission and Natural Gas Grid Expansion Planning approach for large scale systems

In this paper, a multi-period integrated approach is developed for Generation Expansion Planning (GEP), Transmission Expansion Planning (TEP) and Natural Gas Grid Expansion Planning (NGGEP) problems for large scale systems. New nodal generation requirements, new transmission lines and Natural Gas (NG) pipelines are simultaneously obtained in a multi-period planning horizon. In order to solve the large scale mixed integer nonlinear problem, an approach is developed based on genetic algorithms. The proposed approach performance is investigated by applying it to a typical electric-NG combined grid. Moreover, in order to evaluate the effectiveness of the proposed approach for real-world systems, it has been applied to the Iranian power and NG system. The results indicate that the proposed approach is applicable for large scale systems.